Types of Electrical Machines— Lesson 2

This lesson covers the realization of various electrical machines, including DC machines, AC machines, synchronous motors, induction motors, and reluctance machines. It explains the basic principles of magnetic fields and how they are applied in different machines. For instance, it discusses how a DC machine operates, the role of brushes and commutators, and how to avoid them by swapping the stator to the rotor side and vice versa. The lesson also delves into the workings of synchronous motors, induction motors, and brushless DC motors. It further explains the concept of magnetic locking and how it influences the operation of these machines. The lesson concludes with an overview of the applications of these machines in various industries.

Video Highlights

00:00 - Introduction
01:13 - Discussion on the operation of a synchronous motor and induction motor and brushless DC motor
16:20 - Winding arrangements
18:13 - Discussion on the applications of different machines
18:57 - Overview and applications of brushless DC motor
22:14 - Overview and applications of Synchronous Motors
23:12 - Overview and applications of Induction motor
25:12 - Overview and applications switched reluctance motor
22:14 - Overview and applications stepper motor

Key Takeaways

- All rotating machines require two fields to generate a torque based on the attractions and repulsions.
- The DC machine operates through brushes and commutators, which can be avoided by swapping the stator to the rotor side and vice versa.
- Synchronous motors and induction motors work on the principle of magnetic locking.
- Brushless DC motors eliminate the need for brushes and commutators.
- The torque in these machines depends on the mutual interaction of magnetic flux and stator flux.